Front plate and display device using same

Details Front plate and display device using same Front plate and display device using same

2007-11-27

2007-11-27

Patel, Ashok (Department: 2879)

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

C313S461000, C313S478000, C359S885000, C349S105000

Reexamination Certificate

active

11048168

ABSTRACT:
Frusto-conical needle-shaped light guide paths are implanted on the surface of a display panel such that output light from display elements propagate through the needle-shaped light guide paths through total reflection, while external light repeats reflections multiple times on wedge-shaped surfaces of the light guide paths, and attenuates. A light absorbing film is coated on the surfaces of the needle-shaped light guide paths to increase a contrast ratio. Thus, a higher contrast can be accomplished in a bright room, and cross-talk between adjacent pixels is reduced. A reduction in contrast due to display light is also alleviated by employing longer implanted needle-shaped light guide paths, and bringing light incident surfaces of the needle-shaped light guide paths into close contact with the surface of the display panel.

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